Malicious PDF — malware analysis report

Static analysis result for SHA-256 432715ffdf9df7c2…

MALICIOUS

PDF

65.1 KB Created: 2021-09-07 16:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89f3bfa14921c488a02c8956cb97fdac SHA-1: 6f38eb2a5fddef7b3af66211fbc97839f2890d8b SHA-256: 432715ffdf9df7c2d368f5b7af31dace391317d17dc400418c42a4f0484da256
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or phishing. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5370

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.mustwalge.ee/data/content/files/jukijogekonijopodinusona.pdf In PDF document text
    • https://alcoolassistance-creuse.net/www/site/js/ckfinder/userfiles/files/80426295713.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/aa0200392c469dcb288763e179c564b1/22009332871.pdfIn PDF document text
    • https://www.iieng.org/editor/ckfinder/userfiles/files/10027499569.pdfIn PDF document text
    • http://hz-karavany.cz/ckfinder/userfiles/files/pusuvejagejekuwijedig.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6ab8d146d---suwideporesagurafideto.pdfIn PDF document text
    • https://zzwgjx.com/d/files/larebiwegudugivolivek.pdfIn PDF document text
    • http://inruho.ru/ckfinder/userfiles/files/rororegudagokozepi.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/fivimukesokipiv.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1ba73bcc7---28179495816.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/gorufirobixefeb.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083637d34467---mujubob.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qrr5ohnmaf8f7rho5shkmftmv5/fagoserasipalarekaguvuto.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/nenomunefigutazozoreziroj.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/difigopidozeku.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ec43976f0d9---gajonanipepusipebabexud.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/krfembmqrdar33v4k8bnu94a3s/tabeke.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/2pnujufvvvngijsce8t3usrl47/sutodalutoriwugadun.pdfIn PDF document text
    • http://salkim.com/userfiles/file/welizebeb.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/28172686582.pdfIn PDF document text
    • http://elitvorota.ru/f/file/kevufijev.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/45749aefcd6e5d2ea941375ad5986c74/pufuvavoped.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bbfa50f8d---24554357337.pdfIn PDF document text
    • http://sorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/46154951213.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b18aa929635---69551704904.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/67972424688.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/86646012242.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/43ibl5f9pj21daso0g8ru2j851/31279292184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=soup+recipes+in+tamil+pdf+free+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF61 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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